fmt: adapt defaults to the ones used by GNU fmt

cakebaker · cakebaker · commit 09db8d8af926 · 2023-05-31T16:41:56.000+02:00
diff --git a/src/uu/fmt/src/fmt.rs b/src/uu/fmt/src/fmt.rs
@@ -76,8 +76,8 @@ impl Default for FmtOptions {
             use_anti_prefix: false,
             anti_prefix: String::new(),
             xanti_prefix: false,
-            width: 79,
-            goal: 74,
+            width: 75,
+            goal: 70,
             tabwidth: 8,
         }
     }
@@ -95,6 +95,9 @@ impl Default for FmtOptions {
 #[allow(clippy::cognitive_complexity)]
 #[allow(clippy::field_reassign_with_default)]
 fn parse_arguments(args: impl uucore::Args) -> UResult<(Vec<String>, FmtOptions)> {
+    // by default, goal is 93% of width
+    const DEFAULT_GOAL_TO_WIDTH_RATIO: usize = 93;
+
     let matches = uu_app().try_get_matches_from(args)?;
 
     let mut files: Vec<String> = matches
@@ -149,7 +152,10 @@ fn parse_arguments(args: impl uucore::Args) -> UResult<(Vec<String>, FmtOptions)
                 ),
             ));
         }
-        fmt_opts.goal = cmp::min(fmt_opts.width * 94 / 100, fmt_opts.width - 3);
+        fmt_opts.goal = cmp::min(
+            fmt_opts.width * DEFAULT_GOAL_TO_WIDTH_RATIO / 100,
+            fmt_opts.width - 3,
+        );
     };
 
     if let Some(s) = matches.get_one::<String>(OPT_GOAL) {
@@ -163,7 +169,10 @@ fn parse_arguments(args: impl uucore::Args) -> UResult<(Vec<String>, FmtOptions)
             }
         };
         if !matches.get_flag(OPT_WIDTH) {
-            fmt_opts.width = cmp::max(fmt_opts.goal * 100 / 94, fmt_opts.goal + 3);
+            fmt_opts.width = cmp::max(
+                fmt_opts.goal * 100 / DEFAULT_GOAL_TO_WIDTH_RATIO,
+                fmt_opts.goal + 3,
+            );
         } else if fmt_opts.goal > fmt_opts.width {
             return Err(USimpleError::new(1, "GOAL cannot be greater than WIDTH."));
         }
@@ -364,14 +373,14 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_WIDTH)
                 .short('w')
                 .long("width")
-                .help("Fill output lines up to a maximum of WIDTH columns, default 79.")
+                .help("Fill output lines up to a maximum of WIDTH columns, default 75.")
                 .value_name("WIDTH"),
         )
         .arg(
             Arg::new(OPT_GOAL)
                 .short('g')
                 .long("goal")
-                .help("Goal width, default ~0.94*WIDTH. Must be less than WIDTH.")
+                .help("Goal width, default of 93% of WIDTH. Must be less than WIDTH.")
                 .value_name("GOAL"),
         )
         .arg(
