Avoid multiple trim()

Author: sylvestre

src/uu/date/src/date.rs

@@ -256,21 +256,22 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     // Iterate over all dates - whether it's a single date or a file.
     let dates: Box<dyn Iterator<Item = _>> = match settings.date_source {
         DateSource::Human(ref input) => {
+            let input = input.trim();
             // GNU compatibility (Empty string):
             // An empty string (or whitespace-only) should be treated as midnight today.
-            let is_empty_or_whitespace = input.trim().is_empty();
+            let is_empty_or_whitespace = input.is_empty();
 
             // GNU compatibility (Military timezone 'J'):
             // 'J' is reserved for local time in military timezones.
             // GNU date accepts it and treats it as midnight today (00:00:00).
-            let is_military_j = input.trim().eq_ignore_ascii_case("j");
+            let is_military_j = input.eq_ignore_ascii_case("j");
 
             // GNU compatibility (Military timezone with optional hour offset):
             // Single letter (a-z except j) optionally followed by 1-2 digits.
             // Letter represents midnight in that military timezone (UTC offset).
             // Digits represent additional hours to add.
             // Examples: "m" -> noon UTC (12:00); "m9" -> 21:00 UTC; "a5" -> 04:00 UTC
-            let military_tz_with_offset = parse_military_timezone_with_offset(input.trim());
+            let military_tz_with_offset = parse_military_timezone_with_offset(input);
 
             // GNU compatibility (Pure numbers in date strings):
             // - Manual: https://www.gnu.org/software/coreutils/manual/html_node/Pure-numbers-in-date-strings.html