New Trivadis style for PDF cover. Slight addition to introduction.

Use of codehilite markdown extension for syntax highlighting and line numbers of SQL & PL/SQL.

Author: kibeha

docs/3-coding-style/coding-style.md

@@ -18,7 +18,7 @@ Rule | Description
 
 ### Example
 
-```
+``` sql
 PROCEDURE set_salary(in_employee_id IN employees.employee_id%TYPE) IS
    CURSOR c_employees(p_employee_id IN employees.employee_id%TYPE) IS 
       SELECT last_name
@@ -70,7 +70,7 @@ Tag      | Meaning                                                 | Example
 
 This is an example using the documentation capabilities of SQL Developer. 
 
-```
+``` sql
 /**
 Check whether we passed a valid sql name
 

docs/4-language-usage/1-general/g-1010.md

@@ -9,7 +9,7 @@ It's a good alternative for comments to indicate the start and end of a named pr
 
 ## Example (bad)
 
-```
+``` sql
 BEGIN
    BEGIN 
       NULL;
@@ -24,7 +24,7 @@ END;
 
 ## Example (good)
 
-```
+``` sql
 BEGIN
    <<prepare_data>>
    BEGIN 

docs/4-language-usage/1-general/g-1020.md

@@ -12,7 +12,7 @@ Use a label directly in front of loops and nested anonymous blocks:
 
 ## Example (bad)
 
-```
+``` sql
 DECLARE
    i INTEGER;
    co_min_value CONSTANT INTEGER := 1;
@@ -52,7 +52,7 @@ END;
 
 ## Example (good)
 
-```
+``` sql
 DECLARE
    i INTEGER;
    co_min_value CONSTANT INTEGER := 1;

docs/4-language-usage/1-general/g-1030.md

@@ -9,7 +9,7 @@ Unused variables decrease the maintainability and readability of your code.
 
 ## Example (bad)
 
-```
+``` sql
 CREATE OR REPLACE PACKAGE BODY my_package IS
    PROCEDURE my_proc IS
       l_last_name  employees.last_name%TYPE;
@@ -31,7 +31,7 @@ END my_package;
 
 ## Example (good)
 
-```
+``` sql
 CREATE OR REPLACE PACKAGE BODY my_package IS
    PROCEDURE my_proc IS
       l_last_name  employees.last_name%TYPE;

docs/4-language-usage/1-general/g-1040.md

@@ -9,7 +9,7 @@ Any part of your code, which is no longer used or cannot be reached, should be e
 
 ## Example (bad)
 
-```
+``` sql
 DECLARE
    co_dept_purchasing CONSTANT departments.department_id%TYPE := 30;
 BEGIN
@@ -53,7 +53,7 @@ END;
 
 ## Example (good)
 
-```
+``` sql
 DECLARE
    co_dept_admin CONSTANT dept.deptno%TYPE := 10;
 BEGIN

docs/4-language-usage/1-general/g-1050.md

@@ -11,7 +11,7 @@ All constants should be collated in just one package used as a library. If these
 
 ## Example (bad)
 
-```
+``` sql
 DECLARE
    l_job employees.job_id%TYPE;
 BEGIN
@@ -34,7 +34,7 @@ END;
 
 ## Example (good)
 
-```
+``` sql
 CREATE OR REPLACE PACKAGE constants_up IS
    co_president CONSTANT employees.job_id%TYPE := 'AD_PRES';
 END constants_up;

docs/4-language-usage/1-general/g-1060.md

@@ -11,7 +11,7 @@ Instead of using ROWID for later reference to the original row one should use th
 
 ## Example (bad)
 
-```
+``` sql
 BEGIN
    INSERT INTO employees_log (employee_id
                              ,last_name
@@ -28,7 +28,7 @@ END;
 
 ## Example (good)
 
-```
+``` sql
 BEGIN
    INSERT INTO employees_log (employee_id
                              ,last_name

docs/4-language-usage/1-general/g-1070.md

@@ -9,7 +9,7 @@ Having an end-of-comment within a block comment will end that block-comment. Thi
 
 ## Example (bad)
 
-```
+``` sql
 BEGIN
    /* comment one -- nested comment two */
    NULL;
@@ -21,7 +21,7 @@ END;
 
 ## Example (good)
 
-```
+``` sql
 BEGIN
    /* comment one, comment two */
    NULL;

docs/4-language-usage/2-variables-and-types/1-general/g-2110.md

@@ -9,7 +9,7 @@ Changing the size of the database column last_name in the employees table from `
 
 ## Example (bad)
 
-```
+``` sql
 CREATE OR REPLACE PACKAGE BODY my_package IS
    PROCEDURE my_proc IS
       l_last_name  VARCHAR2(20 CHAR);
@@ -29,7 +29,7 @@ END my_package;
 
 ## Example (good)
 
-```
+``` sql
 CREATE OR REPLACE PACKAGE BODY my_package IS
    PROCEDURE my_proc IS
       l_last_name  employees.last_name%TYPE;

docs/4-language-usage/2-variables-and-types/1-general/g-2120.md

@@ -11,7 +11,7 @@ A single location could be either a type specification package or the database (
 
 ## Example (bad)
 
-```
+``` sql
 CREATE OR REPLACE PACKAGE BODY my_package IS
    PROCEDURE my_proc IS
       SUBTYPE big_string_type IS VARCHAR2(1000 CHAR);
@@ -25,7 +25,7 @@ END my_package;
 
 ## Example (good)
 
-```
+``` sql
 CREATE OR REPLACE PACKAGE types_up IS
    SUBTYPE big_string_type IS VARCHAR2(1000 CHAR);
 END types_up;