Format the text with auto indetation to be more readble.

man/plowing.Rd

@@ -6,20 +6,20 @@
 \title{Plowing level on corn yield}
 \format{a \code{data.frame} with 24 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental
-(15th ed.). Piracicaba, São Paulo: FEALQ. (page 91)
+Frederico, P. (2009). Curso de Estatística Experimental (15th
+    ed.). Piracicaba, São Paulo: FEALQ. (page 91)
 }
 \usage{
 data(plowing)
 }
 \description{
 These data are from an experiment done by the engineer
-Duvilio Ometto to study the effect of plowing level on corn yield. It
-was used 2 levels of plowing: normal (or superficial) and deep. The
-experiment was done in a randomized complete block design with 6
-blocks. Corn yield (t/ha) was recorded in each experimental unit
-but in this experiment there was 2 experimental units for each factor
-level in each block.
+    Duvilio Ometto to study the effect of plowing level on corn
+    yield. It was used 2 levels of plowing: normal (or superficial)
+    and deep. The experiment was done in a randomized complete block
+    design with 6 blocks. Corn yield (t/ha) was recorded in each
+    experimental unit but in this experiment there was 2 experimental
+    units for each factor level in each block.
 
 \itemize{
     \item \code{block} a categorical unordered factor with 6 levels.

man/potatoyield.Rd

@@ -6,17 +6,17 @@
 \title{Potato variety competition experiment}
 \format{a \code{data.frame} with 32 records and 3 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental
-(15th ed.). Piracicaba, São Paulo: FEALQ. (page 76)
+Frederico, P. (2009). Curso de Estatística Experimental (15th
+    ed.). Piracicaba, São Paulo: FEALQ. (page 76)
 }
 \usage{
 data(potatoyield)
 }
 \description{
 These data are from an experiment done by the engineer
-Oscar A. Garay at Balcare, Argentina. The experiment was done in a
-randomized complete block design with 4 blocks. Potato yield (t/ha)
-was recorded in each experimental unit.
+    Oscar A. Garay at Balcare, Argentina. The experiment was done in
+    a randomized complete block design with 4 blocks. Potato yield
+    (t/ha) was recorded in each experimental unit.
 
 \itemize{
     \item \code{block} a categorical unordered factor with 4 levels.

man/wgpigs.Rd

@@ -6,8 +6,8 @@
 \title{Feeding type in pig weight gain}
 \format{a \code{data.frame} with 20 records and 2 variables.}
 \source{
-Frederico, P. (2009). Curso de Estatística Experimental
-(15th ed.). Piracicaba, São Paulo: FEALQ. (page 62)
+Frederico, P. (2009). Curso de Estatística Experimental (15th
+    ed.). Piracicaba, São Paulo: FEALQ. (page 62)
 }
 \usage{
 data(wgpigs)
@@ -15,10 +15,11 @@ data(wgpigs)
 \description{
 This is an artifial dataset corresponding a experiment
     to study the effect of feeding type (factor with 4 categorical
-nominal levels) in pig weight gain. The experiment was a randomized
-complete design with five experimental units per treatment level. The
-experimental unit was a pig. The response measured was weight gain
-from the beggining to the end of the experiment.
+    nominal levels) in pig weight gain. The experiment was a
+    randomized complete design with five experimental units per
+    treatment level. The experimental unit was a pig. The response
+    measured was weight gain from the beggining to the end of the
+    experiment.
 
 \itemize{
     \item \code{ft} feeding type, a categorical factor with 4