Remove spaces before square braces

NEWS.md

@@ -45,6 +45,7 @@
   inherits from classes `character`, `utf8` or `vertical` (#693).
 - logical operators within square braces are now moved from the start of a line
   to the end of the previous line (#709).
+- spaces are now removed before `[` and `[[` (#713).
 - minor documentation improvements (#643, #618, #614, #677, #651, #667, #672, 
   #687).
 - The internal `create_tree()` only used in testing of styler now works when the 

R/rules-spaces.R

@@ -122,7 +122,7 @@ remove_space_after_unary_pm_nested <- function(pd) {
 }
 
 remove_space_before_opening_paren <- function(pd_flat) {
-  paren_after <- pd_flat$token == "'('"
+  paren_after <- pd_flat$token %in% c("'('", "'['", "LBB")
   if (!any(paren_after)) {
     return(pd_flat)
   }

tests/testthat/spacing/spacing-square-in.R

@@ -12,3 +12,7 @@ a[2 ]
 a[ 2]
 
 a[ 2 ]
+
+
+a [[2]]
+a [1]

tests/testthat/spacing/spacing-square-out.R

@@ -12,3 +12,7 @@ a[2]
 a[2]
 
 a[2]
+
+
+a[[2]]
+a[1]