Clean-up test comments and remove invalid tests

- 15.10.2.15-3-1 and 15.10.2.15-3-2 are both invalid (U+002F (SOLIDUS) instead of U+005C (REVERSE SOLIDUS) was used to start an escape sequence).
- 15.10.4.1-2 and 15.10.2.2-1 are identical tests, delete the latter.
- Update tests to avoid using runTestCase() function.
- Update multiple test infos to point to correct algorithm step (CharacterRange step 6 instead of step 1).

test/built-ins/RegExp/15.10.2.15-3-1.js

-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// Ecma International makes this code available under the terms and conditions set
-// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
-// "Use Terms").   Any redistribution of this code must retain the above
-// copyright and this notice and otherwise comply with the Use Terms.
-
-/*---
-es5id: 15.10.2.15-3-1
-description: >
-    Pattern - SyntaxError was thrown when 'A' does not contain exactly
-    one character (15.10.2.5 step 3)
-includes: [runTestCase.js]
----*/
-
-function testcase() {
-        try {
-            var regExp = new RegExp("^[/w-c]$");
-
-            return false;
-        } catch (e) {
-            return e instanceof SyntaxError;
-        }
-    }
-runTestCase(testcase);

test/built-ins/RegExp/15.10.2.15-3-2.js

-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// Ecma International makes this code available under the terms and conditions set
-// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
-// "Use Terms").   Any redistribution of this code must retain the above
-// copyright and this notice and otherwise comply with the Use Terms.
-
-/*---
-es5id: 15.10.2.15-3-2
-description: >
-    Pattern - SyntaxError was thrown when 'B' does not contain exactly
-    one character (15.10.2.5 step 3)
-includes: [runTestCase.js]
----*/
-
-function testcase() {
-        try {
-            var regExp = new RegExp("^[a-/w]$");
-
-            return false;
-        } catch (e) {
-            return e instanceof SyntaxError;
-        }
-    }
-runTestCase(testcase);

test/built-ins/RegExp/15.10.2.15-6-1.js

@@ -10,16 +10,8 @@ description: >
     Pattern - SyntaxError was thrown when one character in CharSet 'A'
     greater than one character in CharSet 'B' (15.10.2.15
     CharacterRange step 6)
-includes: [runTestCase.js]
 ---*/
 
-function testcase() {
-        try {
-            var regExp = new RegExp("^[z-a]$");
-
-            return false;
-        } catch (e) {
-            return e instanceof SyntaxError;
-        }
-    }
-runTestCase(testcase);
+assert.throws(SyntaxError, function() {
+  var regExp = new RegExp("^[z-a]$");
+});

test/built-ins/RegExp/15.10.2.2-1.js

-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// Ecma International makes this code available under the terms and conditions set
-// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
-// "Use Terms").   Any redistribution of this code must retain the above
-// copyright and this notice and otherwise comply with the Use Terms.
-
-/*---
-es5id: 15.10.2.2-1
-description: Pattern - SyntaxError was thrown when compile a pattern
-includes: [runTestCase.js]
----*/
-
-function testcase() {
-        try {
-            var regExp = new RegExp("\\");
-
-            return false;
-        } catch (e) {
-            return e instanceof SyntaxError;
-        }
-    }
-runTestCase(testcase);

test/built-ins/RegExp/15.10.2.5-3-1.js

@@ -9,16 +9,8 @@ es5id: 15.10.2.5-3-1
 description: >
     Term - SyntaxError was thrown when max is finite and less than min
     (15.10.2.5 step 3)
-includes: [runTestCase.js]
 ---*/
 
-function testcase() {
-        try {
-            var regExp = new RegExp("0{2,1}");
-
-            return false;
-        } catch (e) {
-            return e instanceof SyntaxError;
-        }
-    }
-runTestCase(testcase);
+assert.throws(SyntaxError, function() {
+  var regExp = new RegExp("0{2,1}");
+});

test/built-ins/RegExp/15.10.4.1-1.js

@@ -7,14 +7,10 @@
 /*---
 es5id: 15.10.4.1-1
 description: >
-    RegExp - no TypeError is thrown when pattern is an object whose
-    [[Class]] property is 'RegExp' and flags is not undefined
-includes: [runTestCase.js]
+    RegExp - no TypeError is thrown when pattern is an object and
+    has a [[RegExpMatcher]] internal slot, and flags is not undefined
 ---*/
 
-function testcase() {
-    var regObj = new RegExp();
-    var regExpObj = new RegExp(regObj, "g");
-    return regExpObj.global;
-}
-runTestCase(testcase);
+var regObj = new RegExp();
+var regExpObj = new RegExp(regObj, "g");
+assert(regExpObj.global);

test/built-ins/RegExp/15.10.4.1-2.js

@@ -9,16 +9,8 @@ es5id: 15.10.4.1-2
 description: >
     RegExp - the thrown error is SyntaxError instead of RegExpError
     when the characters of 'P' do not have the syntactic form Pattern
-includes: [runTestCase.js]
 ---*/
 
-function testcase() {
-        try {
-            var regExpObj = new RegExp('\\');
-
-            return false;
-        } catch (e) {
-            return e instanceof SyntaxError;
-        }
-    }
-runTestCase(testcase);
+assert.throws(SyntaxError, function() {
+  var regExpObj = new RegExp('\\');
+});

test/built-ins/RegExp/15.10.4.1-3.js

@@ -9,16 +9,8 @@ es5id: 15.10.4.1-3
 description: >
     RegExp - the thrown error is SyntaxError instead of RegExpError
     when 'F' contains any character other than 'g', 'i', or 'm'
-includes: [runTestCase.js]
 ---*/
 
-function testcase() {
-        try {
-            var regExpObj = new RegExp('abc', 'a');
-
-            return false;
-        } catch (e) {
-            return e instanceof SyntaxError;
-        }
-    }
-runTestCase(testcase);
+assert.throws(SyntaxError, function() {
+  var regExpObj = new RegExp('abc', 'a');
+});

test/built-ins/RegExp/15.10.4.1-4.js

@@ -7,16 +7,6 @@
 /*---
 es5id: 15.10.4.1-4
 description: RegExp - the SyntaxError is not thrown when flags is 'gim'
-includes: [runTestCase.js]
 ---*/
 
-function testcase() {
-        try {
-            var regExpObj = new RegExp('abc', 'gim');
-
-            return true;
-        } catch (e) {
-            return false;
-        }
-    }
-runTestCase(testcase);
+var regExpObj = new RegExp('abc', 'gim');

test/built-ins/RegExp/S15.10.2.15_A1_T1.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T1
 description: >
     Checking if execution of "/[b-ac-e]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T10.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T10
 description: >
     Checking if execution of "/[\10b-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T11.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T11
 description: >
     Checking if execution of "/[\bd-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T12.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T12
 description: >
     Checking if execution of "/[\Bd-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T13.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T13
 description: >
     Checking if execution of "/[\td-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T14.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T14
 description: >
     Checking if execution of "/[\nd-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T15.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T15
 description: >
     Checking if execution of "/[\vd-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T16.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T16
 description: >
     Checking if execution of "/[\fd-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T17.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T17
 description: >
     Checking if execution of "/[\rd-G]/.exec("a")" leads to throwing

test/built-ins/RegExp/S15.10.2.15_A1_T18.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T18
 description: >
     Checking if execution of "/[\c0001d-G]/.exec("1")" leads to

test/built-ins/RegExp/S15.10.2.15_A1_T19.js

@@ -5,8 +5,11 @@
 info: >
     The internal helper function CharacterRange takes two CharSet parameters A and B and performs the
     following:
-    If A does not contain exactly one character or B does not contain exactly one character then throw
-    a SyntaxError exception
+    2. Let a be the one character in CharSet A.
+    3. Let b be the one character in CharSet B.
+    4. Let i be the character value of character a.
+    5. Let j be the character value of character b.
+    6. If i > j, throw a SyntaxError exception.
 es5id: 15.10.2.15_A1_T19
 description: >
     Checking if execution of "/[\x0061d-G]/.exec("1")" leads to