Fix: Show path separator error regardless of directory existence

Fixes #1873

The error message about patterns containing path separators was only
shown when the pattern was also an existing directory. This change
makes the error consistent by showing it whenever a pattern contains
a path separator (and --full-path is not used), regardless of whether
the pattern is an existing directory.

This ensures users get helpful feedback even when they accidentally
use a path separator in a pattern that doesn't exist as a directory.

Author: Richman018

src/main.rs

@@ -147,10 +147,7 @@ fn set_working_dir(opts: &Opts) -> Result<()> {
 
 /// Detect if the user accidentally supplied a path instead of a search pattern
 fn ensure_search_pattern_is_not_a_path(opts: &Opts) -> Result<()> {
-    if !opts.full_path
-        && opts.pattern.contains(std::path::MAIN_SEPARATOR)
-        && Path::new(&opts.pattern).is_dir()
-    {
+    if !opts.full_path && opts.pattern.contains(std::path::MAIN_SEPARATOR) {
         Err(anyhow!(
             "The search pattern '{pattern}' contains a path-separation character ('{sep}') \
              and will not lead to any search results.\n\n\