Support the COLUMNS environment variable for help/usage output

man/rgbasm.1

@@ -177,6 +177,9 @@ or
 The defaults are 0123.
 .It Fl h , Fl \-help
 Print help text for the program and exit.
+(Help text wraps to the value of the
+.Dv COLUMNS
+environment variable if that is defined as nonzero; or else to the console window width if output is to a TTY.)
 .It Fl I Ar path , Fl \-include Ar path
 Add a new
 .Dq include path ;

man/rgbfix.1

@@ -152,6 +152,9 @@ Trash the global checksum.
 .El
 .It Fl h , Fl \-help
 Print help text for the program and exit.
+(Help text wraps to the value of the
+.Dv COLUMNS
+environment variable if that is defined as nonzero; or else to the console window width if output is to a TTY.)
 .It Fl i Ar game_id , Fl \-game-id Ar game_id
 Set the game ID string
 .Pq Ad 0x13F Ns \(en Ns Ad 0x142

man/rgbgfx.1

@@ -257,6 +257,9 @@ Set the bit depth of the output tile data, in bits per pixel (bpp), either 1 or
 This changes how tile data is output, and the maximum number of colors per palette (2 and 4 respectively).
 .It Fl h , Fl \-help
 Print help text for the program and exit.
+(Help text wraps to the value of the
+.Dv COLUMNS
+environment variable if that is defined as nonzero; or else to the console window width if output is to a TTY.)
 .It Fl i Ar input_tiles , Fl \-input-tileset Ar input_tiles
 Use the specified input tiles in addition to having
 .Nm

man/rgblink.1

@@ -152,6 +152,9 @@ This option automatically enables
 .Fl w .
 .It Fl h , Fl \-help
 Print help text for the program and exit.
+(Help text wraps to the value of the
+.Dv COLUMNS
+environment variable if that is defined as nonzero; or else to the console window width if output is to a TTY.)
 .It Fl l Ar linker_script , Fl \-linkerscript Ar linker_script
 Specify a linker script file that tells the linker how sections must be placed in the ROM.
 The attributes assigned in the linker script must be consistent with any assigned in the code.