Better text file detection for -aa; convert tabs with -a or -aa.

1 files changed, 10 insertions, 8 deletions

diff --git a/src/unalf.rst b/src/unalf.rst
index e23debd..4c3a658 100644
--- a/src/unalf.rst
+++ b/src/unalf.rst
@@ -44,20 +44,22 @@ OPTIONS
 =======
 
 -a
-  Convert text file line endings from Atari EOL to UNIX newline. Text
-  files are detected by name: **\*.txt**, **\*.doc**, **\*.lst** files
-  are considered text.
+  Convert text file line endings and tabs from ATASCII to ASCII. Text
+  files are detected by looking at the first 2 bytes of the extracted
+  file. If both are printable ASCII (or ATASCII EOL, aka **$9B**), the
+  file is considered text.
 
-  Note that *only* line-endings are converted. Other ATASCII characters
-  are left alone. If you need anything more in-depth, use **a8cat**\(1).
+  Note that *only* line-endings and tabs are converted. Other ATASCII
+  characters are left alone. If you need anything more in-depth, use
+  **a8cat**\(1).
 
-.. convert EOLs in text files.
+.. convert EOLs and tabs in text files.
 
--aa
+**-aa**
   Convert line endings in all extracted files. This will corrupt any
   executables or non-text data files, so use with caution.
 
-.. convert EOLs in ALL files.
+.. convert EOLs and tabs in ALL files.
 
 -d output-dir
   Write extracted files to this directory, which will be created if it