* Anañadir algunos mandos importantes
Added a few important commands. How to exit insert mode and other ways to enter insert mode (a for append, o and O for new lines).
* Rename client/src/pages/guide/spanish/vim/basic-usage/index.md to guide/spanish/vim/basic-usage/index.md
* Translation changes.
Mainly translated the examples and other minor translation changes.
Also 'Hello world!' could be translated to 'Hola mundo!' but i don't like that change.
* fix: added .md to current file name
* Rename guide/spanish/php/php-variables.md to guide/spanish/php/php-variable/index.md
* Correct language about exclusivity of BETWEEN clause
SQL BETWEEN clause is inclusive both in the SQL standard as well as in MySQL.
* fix(guide): remove misleading sentence
* Included use of underscore wildcard character
Included the use and example of wildcard character underscore which can be used with LIKE operator
* fix(guide): minor typos and grammar
Removed space between "/" and "body" in line 27 to correct the spacing.
Added "use" in between "container" and "several" to make grammatical sense in line 32. Also added a space between "semantic" and the parathesis in the same line to make text look cleaner.
Added "and" between "<header>" and "<footer>" because there are two items in line 33.
Note: In "Introduction of semantic tags," the grammar and sentence structure does not make sense. I tried to correct it, however, it may not be the right correction and should be reviewed.
* Corrected markdown and code sample formatting
Added code highlighting to `<p>`, to prevent it being interpreted as a new paragraph.
Also made indentation in the code sample consistent.
* Fixed typo and formatting
* Add Keras information
Updated information according to the request made by @scissorsneedfoodtoo and added links to code samples for better understanding
* fix: removed space before title front matter key
The first paragraph had several common translation mistakes, making Spanish less fluent as it was translated word by word so the sentence didn't make much sense in Spanish.
* Elaborated on more cases of factorising equations
-I decided to add other cases of factorising other algebraic equations that involves different values of the quadratic equation apart from 1
* Removing unnecessary <br> tags
