changed backticks

Author: venom1204

R/data.table.R

@@ -740,7 +740,7 @@ replace_dot_alias = function(e) {
       if (is.character(j) || (is.numeric(j) && !is.logical(j))) {
           if (!missingby) {
               j_type = if (is.character(j)) "a character" else "a numeric"
-              fmt = "'by' or 'keyby' is ignored when 'j' is %s vector used for column selection. Perhaps you intended to use '.SD'? For example: DT[, .SD[, %s], by = ...]"
+              fmt = "`by` or `keyby` is ignored when `j` is %s vector used for column selection. Perhaps you intended to use `.SD`? For example: DT[, .SD[, %s], by = ...]"
               warning(sprintf(fmt, j_type, deparse(jsub)), call. = FALSE)
           }
       }

inst/tests/tests.Rraw

@@ -21622,9 +21622,9 @@ local({
 
 # 5397 - keyby/key ignored if numeric indices used in j
 DT = data.table(a=1:4, b=5:8, g=c(1,1,2,2))
-test(2339.1, DT[, 1:2, by=g], DT[, 1:2], warning="'by' or 'keyby' is ignored")
-test(2339.2, DT[, 2:1, keyby=g], DT[, 2:1], warning="'by' or 'keyby' is ignored")
-test(2339.3, DT[, c("b", "a"), by=g, with=FALSE], DT[, c("b", "a")], warning="'by' or 'keyby' is ignored")
+test(2339.1, DT[, 1:2, by=g], DT[, 1:2], warning="`by` or `keyby` is ignored")
+test(2339.2, DT[, 2:1, keyby=g], DT[, 2:1], warning="`by` or `keyby` is ignored")
+test(2339.3, DT[, c("b", "a"), by=g, with=FALSE], DT[, c("b", "a")], warning="`by` or `keyby` is ignored")
 expected_sd = data.table(g=c(1,1,2,2), a=1:4, b=5:8)
 test(2339.4, DT[, .SD[, 1:2], by=g], expected_sd)
 expected_single_int = data.table(g=c(1,2), V1=c(1,1))