replace tabs with 4 spaces

Author: isuruf

src/doc/bootstrap

@@ -40,60 +40,60 @@ for SYSTEM in arch debian fedora cygwin homebrew conda; do
             fi
             PKG_TYPE=$(cat $PKG_SCRIPTS/type)
             if [ -f $SYSTEM_PACKAGES_FILE ]; then
-               PKG_SYSTEM_PACKAGES=$(echo $(${STRIP_COMMENTS} $SYSTEM_PACKAGES_FILE))
-               if [ -n "PKG_SYSTEM_PACKAGES" ]; then
-		   if [ -f $PKG_SCRIPTS/spkg-configure.m4 ]; then
-                       case "$PKG_TYPE" in
-                           standard)
-                               SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
-                               ;;
-                           *)
-                               OPTIONAL_SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
-                               ;;
-                       esac
-		   else
-                       case "$PKG_TYPE" in
-                           standard)
-                               SAGELIB_SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
-                               ;;
-                           *)
-                               SAGELIB_OPTIONAL_SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
-                               ;;
-                       esac
-	           fi
-               fi
+                PKG_SYSTEM_PACKAGES=$(echo $(${STRIP_COMMENTS} $SYSTEM_PACKAGES_FILE))
+                if [ -n "PKG_SYSTEM_PACKAGES" ]; then
+                    if [ -f $PKG_SCRIPTS/spkg-configure.m4 ]; then
+                        case "$PKG_TYPE" in
+                            standard)
+                                SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
+                                ;;
+                            *)
+                                OPTIONAL_SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
+                                ;;
+                        esac
+                    else
+                        case "$PKG_TYPE" in
+                            standard)
+                                SAGELIB_SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
+                                ;;
+                            *)
+                                SAGELIB_OPTIONAL_SYSTEM_PACKAGES+=" $PKG_SYSTEM_PACKAGES"
+                                ;;
+                        esac
+                    fi
+                fi
             fi
         fi
     done
     if [ "${SYSTEM}" = "conda" ]; then
         if [ "${BOOTSTRAP_QUIET}" = "no" ]; then
-	    echo >&2 $0:$LINENO: installing environment.yml, environment-optional.yml, src/environment.yml and src/environment-optional.yml
+            echo >&2 $0:$LINENO: installing environment.yml, environment-optional.yml, src/environment.yml and src/environment-optional.yml
         fi
         echo "name: sage-build" >  environment.yml
-	echo "channels:"        >> environment.yml
-	echo "  - conda-forge"  >> environment.yml
-	echo "  - nodefaults"   >> environment.yml
-	echo "dependencies:"    >> environment.yml
-	for pkg in $SYSTEM_PACKAGES; do
+        echo "channels:"        >> environment.yml
+        echo "  - conda-forge"  >> environment.yml
+        echo "  - nodefaults"   >> environment.yml
+        echo "dependencies:"    >> environment.yml
+        for pkg in $SYSTEM_PACKAGES; do
             echo "  - $pkg" >> environment.yml
-	done
-	cp environment.yml src/environment.yml
-	for pkg in $SAGELIB_SYSTEM_PACKAGES; do
+        done
+        cp environment.yml src/environment.yml
+        for pkg in $SAGELIB_SYSTEM_PACKAGES; do
             echo "  - $pkg" >> src/environment.yml
-	done
-	cp environment.yml environment-optional.yml
-        echo "  # optional packages" >> environment-optional.yml
-	for pkg in $OPTIONAL_SYSTEM_PACKAGES; do
-            echo "  - $pkg" >> environment-optional.yml
         done
-	cp src/environment.yml src/environment-optional.yml
-        echo "  # optional packages" >> src/environment-optional.yml
-	for pkg in $OPTIONAL_SYSTEM_PACKAGES $SAGELIB_OPTIONAL_SYSTEM_PACKAGES; do
+        cp environment.yml environment-optional.yml
+            echo "  # optional packages" >> environment-optional.yml
+        for pkg in $OPTIONAL_SYSTEM_PACKAGES; do
+            echo "  - $pkg" >> environment-optional.yml
+            done
+        cp src/environment.yml src/environment-optional.yml
+            echo "  # optional packages" >> src/environment-optional.yml
+        for pkg in $OPTIONAL_SYSTEM_PACKAGES $SAGELIB_OPTIONAL_SYSTEM_PACKAGES; do
             echo "  - $pkg" >> src/environment-optional.yml
-	done
+        done
     else
         if [ "${BOOTSTRAP_QUIET}" = "no" ]; then
-	    echo >&2 $0:$LINENO: installing "$OUTPUT_DIR"/$SYSTEM.txt and "$OUTPUT_DIR"/$SYSTEM-optional.txt
+            echo >&2 $0:$LINENO: installing "$OUTPUT_DIR"/$SYSTEM.txt and "$OUTPUT_DIR"/$SYSTEM-optional.txt
         fi
         echo "$(sage-print-system-package-command $SYSTEM --prompt --sudo install $(echo $(echo $SYSTEM_PACKAGES | xargs -n 1 echo | sort)))" > "$OUTPUT_DIR"/$SYSTEM.txt
         echo "$(sage-print-system-package-command $SYSTEM --prompt --sudo install $(echo $(echo $OPTIONAL_SYSTEM_PACKAGES | xargs -n 1 echo | sort)))" > "$OUTPUT_DIR"/$SYSTEM-optional.txt