[R] address some lintr warnings (#8609)

demo/data/gen_autoclaims.R

@@ -1,8 +1,10 @@
 site <- 'http://cran.r-project.org'
-if (!require('dummies'))
-    install.packages('dummies', repos=site)
-if (!require('insuranceData'))
-    install.packages('insuranceData', repos=site)
+if (!require('dummies')) {
+    install.packages('dummies', repos = site)
+}
+if (!require('insuranceData')) {
+    install.packages('insuranceData', repos = site)
+}
 
 library(dummies)
 library(insuranceData)
@@ -14,5 +16,16 @@ data$STATE <- as.factor(data$STATE)
 data$CLASS <- as.factor(data$CLASS)
 data$GENDER <- as.factor(data$GENDER)
 
-data.dummy <- dummy.data.frame(data, dummy.class='factor', omit.constants=TRUE);
-write.table(data.dummy, 'autoclaims.csv', sep=',', row.names=F, col.names=F, quote=F)
+data.dummy <- dummy.data.frame(
+    data
+    , dummy.class = 'factor'
+    , omit.constants = TRUE
+)
+write.table(
+    data.dummy
+    , 'autoclaims.csv'
+    , sep = ','
+    , row.names = FALSE
+    , col.names = FALSE
+    , quote = FALSE
+)