Add extra customization options to add_header_above
diff --git a/man/cell_spec.Rd b/man/cell_spec.Rd
index 1138e21..f8d09af 100644
--- a/man/cell_spec.Rd
+++ b/man/cell_spec.Rd
@@ -6,16 +6,18 @@
 \title{Specify Cell/Text format}
 \usage{
 cell_spec(x, format, bold = FALSE, italic = FALSE, monospace = FALSE,
-  underline = FALSE, strikeout = FALSE, color = NULL, background = NULL,
-  align = NULL, font_size = NULL, angle = NULL, tooltip = NULL,
-  popover = NULL, link = NULL, extra_css = NULL, escape = TRUE,
-  background_as_tile = TRUE, latex_background_in_cell = TRUE)
+  underline = FALSE, strikeout = FALSE, color = NULL,
+  background = NULL, align = NULL, font_size = NULL, angle = NULL,
+  tooltip = NULL, popover = NULL, link = NULL, extra_css = NULL,
+  escape = TRUE, background_as_tile = TRUE,
+  latex_background_in_cell = TRUE)
 
 text_spec(x, format, bold = FALSE, italic = FALSE, monospace = FALSE,
-  underline = FALSE, strikeout = FALSE, color = NULL, background = NULL,
-  align = NULL, font_size = NULL, angle = NULL, tooltip = NULL,
-  popover = NULL, link = NULL, extra_css = NULL, escape = TRUE,
-  background_as_tile = TRUE, latex_background_in_cell = FALSE)
+  underline = FALSE, strikeout = FALSE, color = NULL,
+  background = NULL, align = NULL, font_size = NULL, angle = NULL,
+  tooltip = NULL, popover = NULL, link = NULL, extra_css = NULL,
+  escape = TRUE, background_as_tile = TRUE,
+  latex_background_in_cell = FALSE)
 }
 \arguments{
 \item{x}{Things to be formated. It could be a vector of numbers or strings.}