[intellij sh] IDEA-243118 Fix substring replacement parsing

GitOrigin-RevId: 704e4c4f4b3d7700ebe11b15146207d21d74e51b

plugins/sh/src/com/intellij/sh/lexer/Sh.flex

@@ -123,6 +123,7 @@ Filedescriptor           = "&" {IntegerLiteral} | "&-"  //todo:: check the usage
 AssigOp                  = "=" | "+="
 
 ParamExpansionName       = ([a-zA-Z0-9_] | {EscapedAnyChar})*
+ParameterExpansionExpr   = [^}/$`\"]* | {EscapedChar}*
 ParamExpansionSeparator  = "#""#"? | "!" | ":" | ":"?"=" | ":"?"+" | ":"?"-" | ":"?"?" | "@" | ","","? | "^""^"? | "*"
 
 HeredocMarker            = [^\r\n|&\\;()[] \t\"'] | {EscapedChar}
@@ -307,8 +308,8 @@ EvalContent              = [^\r\n$\"`'() ;] | {EscapedAnyChar}
 }
 
 <PARAMETER_EXPANSION_EXPR> {
-  [^}/$`\"]*                               { popState(); return WORD; }
-  [^]                                  { popState(); yypushback(yylength()); }
+  {ParameterExpansionExpr}          { popState(); return WORD; }
+  [^]                                { popState(); yypushback(yylength()); }
 }
 
 <CASE_CONDITION> {

plugins/sh/testData/lexer/paramExpansionEscape.sh

@@ -2,5 +2,5 @@
 arg="${arg//\\/\\\\}"
 printf "%s\n" "${arg}"
 
-arg="${arg//\\/\\\\\}"
-printf "%s\n" "${arg} ff}"
+#IDEA-243118
+"\"${string//\"/\\\"}\""

plugins/sh/testData/lexer/paramExpansionEscape.txt

@@ -27,29 +27,17 @@ word ('arg')
 CLOSE_QUOTE ('"')
 \n ('\n')
 \n ('\n')
-word ('arg')
-= ('=')
-OPEN_QUOTE ('"')
-$ ('$')
-{ ('{')
-word ('arg')
-param_separator ('//')
-word ('\\')
-param_separator ('/')
-word ('\\\\\')
-} ('}')
-CLOSE_QUOTE ('"')
+Comment ('#IDEA-243118')
 \n ('\n')
-word ('printf')
-WHITE_SPACE (' ')
-OPEN_QUOTE ('"')
-STRING_CONTENT ('%s\n')
-CLOSE_QUOTE ('"')
-WHITE_SPACE (' ')
 OPEN_QUOTE ('"')
+STRING_CONTENT ('\"')
 $ ('$')
 { ('{')
-word ('arg')
+word ('string')
+param_separator ('//')
+word ('\"')
+param_separator ('/')
+word ('\\\"')
 } ('}')
-STRING_CONTENT (' ff}')
+STRING_CONTENT ('\"')
 CLOSE_QUOTE ('"')