Merge 9617317345 into d143c60246

swap current line with previous

languages/python.md

@@ -125,6 +125,27 @@
 |  \|= | bitwise or and store|
 |  , | separator as in   ( y=x,z=++x )|
 
+<br>
+
+## Comments
+
+- Comments are very helpful to explain a Python code.
+
+- They are used to make the code more readable.
+
+- They never get executed.
+
+- Comments start with # in Python.
+
+    ```python
+    
+    #This is a comment
+
+    print("Welcome!")
+    
+    ```
+<br>
+
 ### Basic Data Structures
 
 ### List

tools/vim.txt

@@ -105,7 +105,7 @@ gu$                 make lowercase until end of line
 <<                  indent line one column to left
 ==                  auto-indent current line
 ddp                 swap current line with next
-ddkp                swap current line with previous
+ddkP                swap current line with previous
 :%retab             fix spaces / tabs issues in whole file
 :r [name]           insert the file [name] below the cursor.
 :r !{cmd}           execute {cmd} and insert its standard output below the cursor.