Update .gitignore and cat.js

Author: sheida-shab

.gitignore

@@ -1 +1,2 @@
 node_modules
+../../implement-cowsay/.venv/

implement-shell-tools/cat/cat.js

@@ -1,46 +1,39 @@
 import { promises as fs } from "node:fs";
 import { glob } from "glob";
- async function readFile(){
-    let fileNamePattern;
-    let flag;
-    if (process.argv[2].startsWith('-')){
-        flag=process.argv[2];
-        fileNamePattern = process.argv[3];
-     } else {
-         fileNamePattern = process.argv[2];
-       }
-    
-       const filesNameArray = await glob(fileNamePattern);
-       filesNameArray.sort();
-       let lineNumber = 1;
-       //console.log(filesNameArray);
-       
-   
-    for(const file of filesNameArray){
-        const fileContent=await fs.readFile(file,"utf-8");
-        if(flag == null){
-            console.log(fileContent);
-        }else{
-            
-            const linesOfText=fileContent.split(/\r?\n/);
-            if(linesOfText[linesOfText.length-1].trim()===""){
-                linesOfText.pop();
-            }
-            //console.log(linesOfText);
-            for(const line of linesOfText){
-                if (line.trim()==="" && flag==='-b'){
-                 console.log(line);
-                }else {
-                console.log(`${lineNumber} ${line}`);
-                lineNumber ++ ;
-                }
-            }
-            }
+async function readFile() {
+  let fileNamePattern;
+  let flag;
+  if (process.argv[2].startsWith("-")) {
+    flag = process.argv[2];
+    fileNamePattern = process.argv[3];
+  } else {
+    fileNamePattern = process.argv[2];
+  }
 
-        
-        
-    }
+  const filesNameArray = await glob(fileNamePattern);
+  filesNameArray.sort();
+  let lineNumber = 1;
+
+  for (const file of filesNameArray) {
+    const fileContent = await fs.readFile(file, "utf-8");
+    if (flag == null) {
+      console.log(fileContent);
+    } else {
+      const linesOfText = fileContent.split(/\r?\n/);
+      if (linesOfText[linesOfText.length - 1].trim() === "") {
+        linesOfText.pop();
+      }
+
+      for (const line of linesOfText) {
+        if (line.trim() === "" && flag === "-b") {
+          console.log(line);
+        } else {
+          console.log(`${lineNumber} ${line}`);
+          lineNumber++;
+        }
+      }
     }
-    
- 
- readFile();
+  }
+}
+
+readFile();