[gdb/testsuite] Fix typo in proc lines

Proc lines contains a typo:
...
  string_form { set $_line_string_form $value }
...

Remove the incorrect '$' in '$_line_string_form'.

Tested on x86_64-linux.

diff --git a/gdb/testsuite/lib/dwarf.exp b/gdb/testsuite/lib/dwarf.exp
index 94f67652e19e5c3dd2b83d113c068fade1860124..96978b8386a95461082b00e6633d71a109be716f 100644 (file)
--- a/gdb/testsuite/lib/dwarf.exp
+++ b/gdb/testsuite/lib/dwarf.exp
@@ -2209,7 +2209,7 @@ namespace eval Dwarf {
                addr_size { set _unit_addr_size $value }
                seg_sel_size { set _seg_sel_size $value }
                default_is_stmt { set _default_is_stmt $value }
-               string_form { set $_line_string_form $value }
+               string_form { set _line_string_form $value }
                default { error "unknown option $name" }
            }
        }