Fix vim breakage. Detect ~/.vim/vimrc as well

src/vim.rs

@@ -1,3 +1,4 @@
+use super::home_path;
 use std::fs;
 use std::path::PathBuf;
 
@@ -31,3 +32,21 @@ impl PluginFramework {
         }
     }
 }
+
+pub fn vimrc() -> Option<PathBuf> {
+    {
+        let vimrc = home_path(".vimrc");
+        if vimrc.exists() {
+            return Some(vimrc);
+        }
+    }
+
+    {
+        let vimrc = home_path(".vim/vimrc");
+        if vimrc.exists() {
+            return Some(vimrc);
+        }
+    }
+
+    None
+}