Add en/0.7.x.md syntax highlighting

en/07.5.md

@@ -23,7 +23,7 @@ In Go, most of the file operation functions are located in the `os` package. Her
 	Removes multiple directories according to `path`. Directories will not be deleted if `path` is a single path. 
 
 Code sample:
-
+```Go
 	package main
 
 	import (
@@ -40,7 +40,7 @@ Code sample:
 		}
 		os.RemoveAll("astaxie")
 	}
-
+```
 ## Files
 
 ### Create and open files
@@ -83,7 +83,7 @@ Functions for writing files:
 	Write a string to a file.
 	
 Code sample:
-
+```Go
 	package main
 
 	import (
@@ -104,7 +104,7 @@ Code sample:
 			fout.Write([]byte("Just a test!\r\n"))
 		}
 	}
-
+```
 ### Read files
 
 Functions for reading files:
@@ -118,7 +118,7 @@ Functions for reading files:
 	Read data from position `off` to `b`.
 
 Code sample:
-
+```Go
 	package main
 
 	import (
@@ -143,7 +143,7 @@ Code sample:
 			os.Stdout.Write(buf[:n])
 		}
 	}
-
+```
 ### Delete files
 
 Go uses the same function for removing files and directories: