l10n: port seq for translation + add french

src/uu/seq/locales/en-US.ftl

@@ -2,3 +2,19 @@ seq-about = Display numbers from FIRST to LAST, in steps of INCREMENT.
 seq-usage = seq [OPTION]... LAST
   seq [OPTION]... FIRST LAST
   seq [OPTION]... FIRST INCREMENT LAST
+
+# Help messages
+seq-help-separator = Separator character (defaults to \n)
+seq-help-terminator = Terminator character (defaults to \n)
+seq-help-equal-width = Equalize widths of all numbers by padding with zeros
+seq-help-format = use printf style floating-point FORMAT
+
+# Error messages
+seq-error-parse = invalid { $type } argument: { $arg }
+seq-error-zero-increment = invalid Zero increment value: { $arg }
+seq-error-no-arguments = missing operand
+seq-error-format-and-equal-width = format string may not be specified when printing equal width strings
+
+# Parse error types
+seq-parse-error-type-float = floating point
+seq-parse-error-type-nan = 'not-a-number'

src/uu/seq/locales/fr-FR.ftl

@@ -0,0 +1,20 @@
+seq-about = Afficher les nombres de PREMIER à DERNIER, par incréments d'INCRÉMENT.
+seq-usage = seq [OPTION]... DERNIER
+  seq [OPTION]... PREMIER DERNIER
+  seq [OPTION]... PREMIER INCRÉMENT DERNIER
+
+# Messages d'aide
+seq-help-separator = Caractère séparateur (par défaut \n)
+seq-help-terminator = Caractère terminateur (par défaut \n)
+seq-help-equal-width = Égaliser les largeurs de tous les nombres en remplissant avec des zéros
+seq-help-format = utiliser le FORMAT de nombre à virgule flottante de style printf
+
+# Messages d'erreur
+seq-error-parse = argument { $type } invalide : { $arg }
+seq-error-zero-increment = valeur d'incrément zéro invalide : { $arg }
+seq-error-no-arguments = opérande manquant
+seq-error-format-and-equal-width = la chaîne de format ne peut pas être spécifiée lors de l'impression de chaînes de largeur égale
+
+# Types d'erreur d'analyse
+seq-parse-error-type-float = nombre à virgule flottante
+seq-parse-error-type-nan = 'non-un-nombre'

src/uu/seq/src/error.rs

@@ -5,9 +5,11 @@
 // spell-checker:ignore numberparse
 //! Errors returned by seq.
 use crate::numberparse::ParseNumberError;
+use std::collections::HashMap;
 use thiserror::Error;
 use uucore::display::Quotable;
 use uucore::error::UError;
+use uucore::locale::{get_message, get_message_with_args};
 
 #[derive(Debug, Error)]
 pub enum SeqError {
@@ -15,29 +17,32 @@ pub enum SeqError {
     ///
     /// The parameters are the [`String`] argument as read from the
     /// command line and the underlying parsing error itself.
-    #[error("invalid {} argument: {}", parse_error_type(.1), .0.quote())]
+    #[error("{}", get_message_with_args("seq-error-parse", HashMap::from([("type".to_string(), parse_error_type(.1).to_string()), ("arg".to_string(), .0.quote().to_string())])))]
     ParseError(String, ParseNumberError),
 
     /// The increment argument was zero, which is not allowed.
     ///
     /// The parameter is the increment argument as a [`String`] as read
     /// from the command line.
-    #[error("invalid Zero increment value: {}", .0.quote())]
+    #[error("{}", get_message_with_args("seq-error-zero-increment", HashMap::from([("arg".to_string(), .0.quote().to_string())])))]
     ZeroIncrement(String),
 
     /// No arguments were passed to this function, 1 or more is required
-    #[error("missing operand")]
+    #[error("{}", get_message_with_args("seq-error-no-arguments", HashMap::new()))]
     NoArguments,
 
     /// Both a format and equal width where passed to seq
-    #[error("format string may not be specified when printing equal width strings")]
+    #[error(
+        "{}",
+        get_message_with_args("seq-error-format-and-equal-width", HashMap::new())
+    )]
     FormatAndEqualWidth,
 }
 
-fn parse_error_type(e: &ParseNumberError) -> &'static str {
+fn parse_error_type(e: &ParseNumberError) -> String {
     match e {
-        ParseNumberError::Float => "floating point",
+        ParseNumberError::Float => get_message("seq-parse-error-type-float"),
-        ParseNumberError::Nan => "'not-a-number'",
+        ParseNumberError::Nan => get_message("seq-parse-error-type-nan"),
     }
 }
 

src/uu/seq/src/seq.rs

@@ -227,26 +227,26 @@ pub fn uu_app() -> Command {
             Arg::new(OPT_SEPARATOR)
                 .short('s')
                 .long("separator")
-                .help("Separator character (defaults to \\n)"),
+                .help(get_message("seq-help-separator")),
         )
         .arg(
             Arg::new(OPT_TERMINATOR)
                 .short('t')
                 .long("terminator")
-                .help("Terminator character (defaults to \\n)"),
+                .help(get_message("seq-help-terminator")),
         )
         .arg(
             Arg::new(OPT_EQUAL_WIDTH)
                 .short('w')
                 .long("equal-width")
-                .help("Equalize widths of all numbers by padding with zeros")
+                .help(get_message("seq-help-equal-width"))
                 .action(ArgAction::SetTrue),
         )
         .arg(
             Arg::new(OPT_FORMAT)
                 .short('f')
                 .long(OPT_FORMAT)
-                .help("use printf style floating-point FORMAT"),
+                .help(get_message("seq-help-format")),
         )
         .arg(
             // we use allow_hyphen_values instead of allow_negative_numbers because clap removed