lexer: `get_token` is now protected

Signed-off-by: Jean Privat <jean@pryen.org>
parser: add ToolContext#parse_something

Signed-off-by: Jean Privat <jean@pryen.org>
libhtml: `HTMLTag.append` add a text-child node

Signed-off-by: Jean Privat <jean@pryen.org>
libhtml: more efficiency way to render HTML

Signed-off-by: Jean Privat <jean@pryen.org>
lib: fix typo and style in documentation

Signed-off-by: Jean Privat <jean@pryen.org>
model: fix typo and style in documentation

Signed-off-by: Jean Privat <jean@pryen.org>
parser: fix typo and style in documentation

Signed-off-by: Jean Privat <jean@pryen.org>
nit tools: fix typo and style in documentation

Signed-off-by: Jean Privat <jean@pryen.org>
Merge branch 'libhtml'
tests: update sav/base_covar_int and sav/base_virtual_int

because lines in kernel.nit has changed

Signed-off-by: Jean Privat <jean@pryen.org>
Merge branch 'betterdoc'