Clean up two awkward wgettext_fmt invocations

Author: faho

src/builtins/abbr.rs

@@ -324,7 +324,7 @@ fn abbr_add(opts: &Options, streams: &mut IoStreams) -> Option<c_int> {
                     .append(wgettext_fmt!("%ls: %ls\n", CMD, regex_pattern.as_utfstr()));
                 streams
                     .err
-                    .append(wgettext_fmt!("%ls: %*ls\n", CMD, offset, "^"));
+                    .append(sprintf!("%ls: %*ls\n", CMD, offset, "^"));
             }
             return STATUS_INVALID_ARGS;
         }

src/parser.rs

@@ -947,7 +947,7 @@ impl Parser {
                     &wgettext_fmt!(
                         "Could not write profiling information to file '%s': %s",
                         &String::from_utf8_lossy(path),
-                        format!("{}", err)
+                        err.to_string()
                     )
                 );
                 return;