some shellcheck.net fixes

.gitignore

@@ -1,3 +1,4 @@
 *.data
 *.properties
 *.battle
+*.log

robocode-svm

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 set -u
-set -e
+# set -x
 
 # File locations
 path="$HOME/dev/bash/robocode/svm"
@@ -20,15 +20,15 @@ robot2="sample.VelociRobot"
 
 # Run battle without GUI, following the settings file, and returning the lines containing winners
 battle() {
-	echo $(robocode -nodisplay -battle "$settings" | tail -2);
+	robocode -nodisplay -battle "$settings" | tail -2;
 }
 
 # Make sure files are right
-cd $path
+cd "$path";
 rm -f "$results"; touch "$results"
 
 # Repeat the battle desired number of times
-for i in `seq 1 $rounds`;
+for i in $(seq 1 $rounds);
 do
 	# Generate input parameters
 	number=$RANDOM; let "number %= $width"; x=$number
@@ -44,7 +44,7 @@ robocode.battle.numRounds=1
 robocode.battle.gunCoolingRate=0.1
 robocode.battle.rules.inactivityTime=450
 robocode.battle.selectedRobots=$robot1,$robot2
-robocode.battle.initialPositions=($(($width/2)),$(($height/2)),0),($x,$y,$alpha)" > "$settings"
+robocode.battle.initialPositions=($((width/2)),$((height/2)),0),($x,$y,$alpha)" > "$settings"
 
 	# If the robots are of the same name
 	if [ "$robot1" == "$robot2" ] ; then
@@ -72,5 +72,5 @@ te=$(bc <<< "scale=0; ($rounds - $tr) / 1");
 
 # Scale the results to interval <0, 1> and split them to training set and testing set;
 # misuse tee for 'process substituion' and send its stdout do /dev/null
-svm-scale -l 0 -u 1 "$results" | tee  >(head -n $tr > "$training") >(tail -n $te > "$testing") > /dev/null
+svm-scale -l 0 -u 1 "$results" | tee  >(head -n "$tr" > "$training") >(tail -n "$te" > "$testing") > /dev/null