diff --git a/man/plowing.Rd b/man/plowing.Rd
index 22c538f000d245fd2f1f2f66ccd181754ad500eb..08bd7fde8c86c7ccafeb29b60ecf1c3c9a7dfa55 100644
--- a/man/plowing.Rd
+++ b/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.
diff --git a/man/potatoyield.Rd b/man/potatoyield.Rd
index aa78816a35cf785dcff08dda991b24da3e8a1d91..c4579659b31aed480803e3b82e5d239d4191d544 100644
--- a/man/potatoyield.Rd
+++ b/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.
diff --git a/man/wgpigs.Rd b/man/wgpigs.Rd
index 67eebec51c8437acda3321ec8541163b2985092d..0ffa7f43348166d621a14d2ed3f3d3bf854db82f 100644
--- a/man/wgpigs.Rd
+++ b/man/wgpigs.Rd
@@ -6,19 +6,20 @@
 \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)
 }
 \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.
+    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.
 
 \itemize{
     \item \code{ft} feeding type, a categorical factor with 4