Correct spelling "Built-in" and BIF

Author: FranBarInstance

README.md

@@ -130,7 +130,7 @@ Now you can use:
 
 Actually you can always use "trans" because if there is no translation it returns the text.  See: [locale](https://franbarinstance.github.io/neutralts-docs/docs/neutralts/doc/#locale--) and [trans](https://franbarinstance.github.io/neutralts-docs/docs/neutralts/doc/#trans--).
 
-Bif layout (Build-in function)
+BIF Structure (Built-in function)
 ------------------------------
 
 ```neutral
@@ -151,19 +151,19 @@ Bif layout (Build-in function)
             |         ^
             |         |
             |         `-- source
-            `-- Build-in function
+            `-- Built-in function
 
 ```
 
-Bif example: (See: [syntax](https://franbarinstance.github.io/neutralts-docs/docs/neutralts/doc/#syntax))
+BIF example: (See: [syntax](https://franbarinstance.github.io/neutralts-docs/docs/neutralts/doc/#syntax))
 
 ```neutral
 {:filled; varname >>
     Hello!
 :}
 ```
 
-Neutral TS template engine is based on Bifs with block structure, we call the set of nested Bifs of the same level a block:
+Neutral TS template engine is based on BIFs with block structure, we call the set of nested BIFs of the same level a block:
 
 ```neutral
 
@@ -203,7 +203,7 @@ Short circuit at block level, if varname is not defined, the following ">>" is n
 :}
 ```
 
-By design all Bifs can be nested and there can be a Bif anywhere in another Bif except in the name.
+By design all BIFs can be nested and there can be a BIF anywhere in another BIF except in the name.
 
 Data
 ----

doc/bif-coalesce.md

@@ -61,7 +61,7 @@ Can be nested (no limit):
 Blocks
 ------
 
-Each *block* can be a single Bif, or a nested set of them:
+Each *block* can be a single BIF, or a nested set of them:
 
 ```html
                 {:coalesce;
@@ -106,7 +106,7 @@ If the variable with spaces was nested, then the result would be an empty block,
 :}
 ```
 
-Unprintable Bif {:;:} is not a zero length string, the following will show nothing:
+Unprintable BIF {:;:} is not a zero length string, the following will show nothing:
 
 ```html
 {:coalesce;

doc/bif-unprintable.md

@@ -106,7 +106,7 @@ Output:
 <div>Hello</div>
 ```
 
-But in special cases we may need to make it so that spaces or carriage returns are not removed. And this is the main use of unprintable Bif:
+But in special cases we may need to make it so that spaces or carriage returns are not removed. And this is the main use of unprintable BIF:
 
 ```text
 <pre>

doc/syntax.md

@@ -1,9 +1,9 @@
 Syntax
 ======
 
-The main element of Neutral TS is the BIF (Build-in function), would be the equivalent of functions and would display an output, the output is always a string or nothing (empty string).
+The main element of Neutral TS is the BIF (Built-in function), would be the equivalent of functions and would display an output, the output is always a string or nothing (empty string).
 
-### Bif layout
+### BIF Structure
 
 ```text
 
@@ -32,11 +32,11 @@ The main element of Neutral TS is the BIF (Build-in function), would be the equi
  ------------------------------------------
                      ^
                      |
-                     ·-- Bif (Build-in function)
+                     ·-- BIF (Built-in function)
 
 ```
 
-Bif example:
+BIF example:
 
 ```text
 {:filled; varname >>
@@ -50,7 +50,7 @@ Sometimes they only carry parameters or code:
 {:snippet; snipname :}
 ```
 
-Any number of spaces can be used to separate each part of a bif except the name, the following is an error:
+Any number of spaces can be used to separate each part of a BIF except the name, the following is an error:
 
 ```diff
 -{: filled ; varname >>
@@ -158,7 +158,7 @@ They can be nested, but different delimiters must be used:
 Nesting
 -------
 
-By design all Bifs can be nested and there can be a Bif anywhere in another Bif except in the name.
+By design all BIFs can be nested and there can be a BIF anywhere in another BIF except in the name.
 
 ```text
 {:eval; {:code; {:code; ... :} :} >>

src/lib.rs

@@ -1,7 +1,7 @@
 #![doc = include_str!("../README.md")]
 
 
-//  Build-in function layout
+//  Built-in function layout
 //
 //  .-------------------------------------------------------------> open bif
 //  | .-----------------------------------------------------------> modifier
@@ -21,7 +21,7 @@
 //          |                      ^
 //          |                      |
 //          |                      ·------------------------------> bif src
-//          ·-----------------------------------------------------> bif: Build-in function
+//          ·-----------------------------------------------------> bif: Built-in function
 
 //  Same level Bif:
 //