Fix _pipepager() to work with multi-call binaries

Programs such as BusyBox, Toybox and Coreutils (also gzib, bzip etc) in multi-call mode derive their identity from the symlink. Resolving the symlink causes them to misbehave.

Author: Jean-Louis Fuchs

src/click/_termui_impl.py

@@ -429,8 +429,11 @@ def _pipepager(
     cmd_filepath = shutil.which(cmd)
     if not cmd_filepath:
         return False
-    # Resolves symlinks and produces a normalized absolute path string.
-    cmd_path = Path(cmd_filepath).resolve()
+
+    # Produces a normalized absolute path string.
+    # multi-call binaries such as busybox derive their identity from the symlink
+    # less -> busybox. resolve() causes them to misbehave. (eg. less becomes busybox)
+    cmd_path = Path(cmd_filepath).absolute()
     cmd_name = cmd_path.name
 
     import subprocess
@@ -520,8 +523,10 @@ def _tempfilepager(
     cmd_filepath = shutil.which(cmd)
     if not cmd_filepath:
         return False
-    # Resolves symlinks and produces a normalized absolute path string.
-    cmd_path = Path(cmd_filepath).resolve()
+    # Produces a normalized absolute path string.
+    # multi-call binaries such as busybox derive their identity from the symlink
+    # less -> busybox. resolve() causes them to misbehave. (eg. less becomes busybox)
+    cmd_path = Path(cmd_filepath).absolute()
 
     import subprocess
     import tempfile