Merge pull request #7846 from frendsick/fix/expr-regex-option-singleline

expr: Fix regex anchor matching behavior with `REGEX_OPTION_SINGLELINE`

src/uu/expr/src/syntax_tree.rs

@@ -178,7 +178,7 @@ impl StringOp {
 
                 let re = Regex::with_options(
                     &re_string,
-                    RegexOptions::REGEX_OPTION_NONE,
+                    RegexOptions::REGEX_OPTION_SINGLELINE,
                     Syntax::grep(),
                 )
                 .map_err(|_| ExprError::InvalidRegexExpression)?;

tests/by-util/test_expr.rs

@@ -642,7 +642,6 @@ mod gnu_expr {
             .stdout_only("1\n");
     }
 
-    #[ignore]
     #[test]
     fn test_anchor() {
         new_ucmd!()