upd readme - _sw, comments and fix

docs/readme.md

@@ -161,12 +161,12 @@ int my_func(int x) {
 
 ```
 // left = function type, right = arguments type
-// sw for use switch
-int sw = int x
-my_func 1 = 1
-my_func 5 = 5 * 2
-my_func 9 = 9 * 3
-my_func X = X * 4
+// "_sw" in function name' end for use switch (no "_sw" in dlang function name)
+int = int x
+my_func_sw 1 = 1
+my_func_sw 5 = 5 * 2
+my_func_sw 9 = 9 * 3
+my_func_sw X = X * 4
 
 ->
 
@@ -299,7 +299,7 @@ void _start(){  }
 
 ```
 // wasm import from js
-void print int a
+void print = int a
 
 ->
 
@@ -405,12 +405,14 @@ __VERSION__
 [deprecated keywords] body cdouble cent cfloat creal delete idouble ifloat ireal ucent
 
 
-dlang
 use
 as
-sw
 ptn
 ptns
+
+*_sw (function name end)
+
+dlang (dlang code without changes)
 ```
 todo