diff3: update path placeholders (#10224)

* diff3: update path placeholders

* diff3: update path placeholder in translations

* diff3: update placeholder in Chinese translation

* Apply suggestions from code review

Co-authored-by: Jack Lin <blueskyson1401@gmail.com>

---------

Co-authored-by: Jack Lin <blueskyson1401@gmail.com>

pages.pt_BR/linux/diff3.md

@@ -5,8 +5,8 @@
 
 - Comparar os arquivos:
 
-`diff3 {{arquivo1}} {{arquivo2}} {{arquivo3}}`
+`diff3 {{caminho/para/arquivo1}} {{caminho/para/arquivo2}} {{caminho/para/arquivo3}}`
 
 - Exibir todas as diferenças, destacando os conflitos:
 
-`diff3 --show-all {{arquivo1}} {{arquivo2}} {{arquivo3}}`
+`diff3 --show-all {{caminho/para/arquivo1}} {{caminho/para/arquivo2}} {{caminho/para/arquivo3}}`

pages.zh/linux/diff3.md

@@ -5,8 +5,8 @@
 
 - 比较文件：
 
-`diff3 {{文件1}} {{文件2}} {{文件3}}`
+`diff3 {{路径/到/文件1}} {{路径/到/文件2}} {{路径/到/文件3}}`
 
 - 展示所有的变化，同时列出冲突：
 
-`diff3 --show-all {{文件1}} {{文件2}} {{文件3}}`
+`diff3 --show-all {{路径/到/文件1}} {{路径/到/文件2}} {{路径/到/文件3}}`

pages/linux/diff3.md

@@ -5,8 +5,8 @@
 
 - Compare files:
 
-`diff3 {{file1}} {{file2}} {{file3}}`
+`diff3 {{path/to/file1}} {{path/to/file2}} {{path/to/file3}}`
 
 - Show all changes, outlining conflicts:
 
-`diff3 --show-all {{file1}} {{file2}} {{file3}}`
+`diff3 --show-all {{path/to/file1}} {{path/to/file2}} {{path/to/file3}}`