[test] Update tests to include location string.

test/libsolidity/syntaxTests/comments/multiline_unicode_direction_override_1.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (71-83): Unicode direction override underflow in comment or string literal.
+// ParserError 8936: (71-83='/*underflow'): Unicode direction override underflow in comment or string literal.

test/libsolidity/syntaxTests/comments/multiline_unicode_direction_override_2.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (75-87): Unicode direction override underflow in comment or string literal.
+// ParserError 8936: (75-87='/*underflow'): Unicode direction override underflow in comment or string literal.

test/libsolidity/syntaxTests/comments/multiline_unicode_direction_override_3.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (71-86): Mismatching directional override markers in comment or string literal.
+// ParserError 8936: (71-86='/*overflow ‮*'): Mismatching directional override markers in comment or string literal.

test/libsolidity/syntaxTests/comments/multiline_unicode_direction_override_4.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (75-93): Mismatching directional override markers in comment or string literal.
+// ParserError 8936: (75-93='/*overflow ‮‮*'): Mismatching directional override markers in comment or string literal.

test/libsolidity/syntaxTests/comments/multiline_unicode_direction_override_6.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (75-86): Unicode direction override underflow in comment or string literal.
+// ParserError 8936: (75-86='/*overflow'): Unicode direction override underflow in comment or string literal.

test/libsolidity/syntaxTests/comments/singleline_unicode_direction_override_1.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (71-84): Unicode direction override underflow in comment or string literal.
+// ParserError 8936: (71-84='// underflow'): Unicode direction override underflow in comment or string literal.

test/libsolidity/syntaxTests/comments/singleline_unicode_direction_override_2.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (75-88): Unicode direction override underflow in comment or string literal.
+// ParserError 8936: (75-88='// underflow'): Unicode direction override underflow in comment or string literal.

test/libsolidity/syntaxTests/comments/singleline_unicode_direction_override_3.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (71-86): Mismatching directional override markers in comment or string literal.
+// ParserError 8936: (71-86='// overflow ‮'): Mismatching directional override markers in comment or string literal.

test/libsolidity/syntaxTests/comments/singleline_unicode_direction_override_4.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (75-93): Mismatching directional override markers in comment or string literal.
+// ParserError 8936: (75-93='// overflow ‮‮'): Mismatching directional override markers in comment or string literal.

test/libsolidity/syntaxTests/comments/singleline_unicode_direction_override_6.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (75-88): Unicode direction override underflow in comment or string literal.
+// ParserError 8936: (75-88='// underflow'): Unicode direction override underflow in comment or string literal.

test/libsolidity/syntaxTests/comments/unicode_direction_in_source_1.sol

@@ -5,4 +5,4 @@ contract C {
     }
 }
 // ----
-// ParserError 2314: (65-66): Expected '(' but got 'ILLEGAL'
+// ParserError 2314: (65-66='â'): Expected '(' but got 'ILLEGAL'

test/libsolidity/syntaxTests/comments/unicode_direction_in_source_2.sol

@@ -5,4 +5,4 @@ contract C {
     }
 }
 // ----
-// ParserError 8936: (75-76): Invalid token.
+// ParserError 8936: (75-76='â'): Invalid token.

test/libsolidity/syntaxTests/comments/unicode_direction_override_1.sol

@@ -7,4 +7,4 @@ contract TimelockUpgrade {
 }
 
 // ----
-// ParserError 8936: (124-135): Mismatching directional override markers in comment or string literal.
+// ParserError 8936: (124-135='/*month‮*'): Mismatching directional override markers in comment or string literal.